(British, historical) December 21st, St.
(British, historical) December 21st, St. Thomas's Day, a day for begging before Christmas.
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UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.
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(British, humorous) Christmas.